Attack Damage

Damage determines how much damage a unit deals with an autoattack, as well as certain abilities. Base Damage is the base amount of Damage an unit starts out with, plus the amount of its primary attribute if it's a hero.

Formula

Damage dealt = Total damage multiplier * ((Base Damage + primary attribute + flat Base Damage) * percentage Base Damage + Damage)

Effects with "±X% Base Damage" does not account for regular Damage modifiers.

It should be noted that buffs that grant bonus damage of a set type do not benefit from Critical Strike, Cleave, or effects that modify your autoattack damage type, even if the effect type matches your autoattack's effect type. These are not classified as Damage or Base Damage modifiers.

Damage increasers

Items

Item	+ Damage
Doom Bringer (w/ 25 charges)	500
Doom Bringer	250
Riftshards (Level 4)	80
Corrupted Sword	70
Riftshards (Level 3)	66
Mock of Brilliance	65
Savage Mace	64
Sword of the High	64
Shieldbreaker (Level 3)	55
Riftshards (Level 2)	53
Shieldbreaker (Level 2)	45
Insanitarius (toggled)	43
Brutalizer	40
Hellflower	40
Riftshards (Level 1)	40
Runed Cleaver	40
Slayer	40
Genjuro	35
Shieldbreaker (Level 1)	35
Assassin's Shroud	30
Wingbow	30
Codex (Level 5)	26
Madfred's Brass Knuckles (w/ 5 charges)	25
Codex (Level 4)	24
Ghost Marchers	24
Shrunken Head	24
Warhammer	24
Codex (Level 3)	22
Codex (Level 2)	20
Harkon's Blade	20
Restoration Stone	20
Symbol of Rage	20
Broadsword	18
Codex (Level 1)	18
Barbed Armor	15
Dawnbringer	15
Spellshards	14
Arcana	12
Frostwolf's Skull	10
Frostburn	10
Frozen Light	10
Icebrand	10
Insanitarius (untoggled)	10
Jade Spire	10
Madfred's Brass Knuckles	10
Nome's Wisdom	10
Null Stone	10
Steamstaff	10
Tablet of Command	10
Whispering Helm	10
Punchdagger	9
Ring of the Teacher	5

Abilities

Various abilities grant bonus Attack Damage in different ways:

Buff/Debuff/Aura: Grants bonus damage as a status effect

Passive: Grants bonus damage as an invisible status effect

On-Hit: Adds damage when the attack lands

The fundamental difference between these is that On-Hit bonuses aren't displayed in the tooltip (most of them display the total damage dealt as a pop-up) and don't factor into effects that scale with Attack Damage (Ex. Enfeeble, Feint's Siphon).

Unit/Item	Source	Target	+ Damage	Duration	Type	Notes
Arachna	Precision	Passive	Up to 120	N/A	On-Hit	Gains up to 20/40/60/80% of your Attack Damage scaling with enemy's missing Health (capped at 20% Health); Grants a minimum of 5% bonus damage; Bonus damage is halved against non-hero units
Armadon	Restless	Self	10/20/30 + 4/8/12 per charge	10 seconds	Buff	Charges are individually timed
Assassin's Shroud	Activation	Self	125	1 Attack or 9 seconds (Stealth)	On-Hit
Booboo	Alpha Male	Passive	50% or 100%	N/A	On-Hit	Applies against jungle creeps, non-boss units; bonus increases with w/ Level 4 Summon Booboo
Booboo	Frenzy	Passive	2 per charge	15 seconds	Buff	Gains a charge when taking non-DoT damage; Max 15 charges; Charges are individually timed
Corrupted Disciple	Corrupted Conduit	Self	1.3/2.6/3.9/5.2 per charge	N/A	Buff	Max 65/130/195/260; Adds one charge per 0.2 seconds while linked; lingers for 13 seconds
Corrupted Sword	Activation	Self	35	N/A	Passive	Consumes item on use
Dawnbringer	Passive	Self	Varies	1 Attack	On-Hit	Grants Damage equal to 40% of Mana spent
Deadwood	Uproot	Self	15/30/45/60	5 Attacks	Buff	Removed when Oakbolt is cast
Drunken Master	Stagger	Self	40/60/800/100	4 seconds	Buff
Empath	As One	Ally Hero	40/60/80	Up to 30 seconds	Buff	Applies to target while bonded, Empath can end the bond between her and the host early
Gauntlet	Enfeeble	On Attack	Varies	4 seconds	Buff	Steals 1% of target's total Damage per charge; Charges are individually timed; Gains bonus Damage in increments of 3
Genjuro	Activation	Self	150	1 Attack or 11 seconds (Stealth)	On-Hit
Logger's Hatchet	Passive	Self	32% (Melee) 12% (Ranged)	N/A	On-Hit	Applies against non-hero, non-boss units only
Kraken	Splash	On Attack	50/90/130/170	N/A	On-Hit	Primary target only
Lord Salforis	Life Tap	Self	60/80/100/120	1 Attack or 5 seconds	Buff
Master of Arms	Bulldozer	Self	0/10/20/30/40	N/A	Passive
Master of Arms	Master's Call	Self	20/40/60	8 seconds	Buff	Only applies to Bulldozer; Removed when shield is broken
Malphas	Destruction	Passive	50/75/100%	N/A	On-Hit	Applies vs. Buildings only
Mauser	Passive	N/A	1.2 x Level	N/A	Passive
Maliken	Enchanted Flames	Self	15/30/45/60	Toggle	Passive
Midas	Transmute	Self	30/70/110	3 seconds	On-Hit	Applies to units with Midas' Touch applied
Night Hound	Pounce	Self	30/60/90/120	N/A	On-Hit	Bonus Damage is added to damage dealt
Night Hound	Backstab	Passive	0.3/0.6/0.9/1.2x Agility	N/A	On-Hit	Applies when attacking an enemy's back
Parasite	Infest	Self	2/3/4/5 x Level	N/A	Buff	Applies to the unit you are Infesting
Rally	Battle Experience	Passive	10/20/30/40	N/A	Passive
Reckless Horseman	Holding Back	Passive	3 per charge	N/A	Passive	Gains one charge per 1% of Health missing
Riptide	Perfect Storm	Ally Heroes	Varies	30 seconds	Aura	Grants Damage equal to 10/20/30% of Riptide's Agility; applies to ally heroes within 1200 units of Riptide
Runed Cleaver	Passive	Self	60% (Melee) 20% (Ranged)	N/A	On-Hit	Applies against non-hero, non-boss units only
Skrap	Scavenge	Vorax	2/3/4/5 per charge	Indefinite	Buff
Soulstealer	Soulsteal	Passive	2 per charge	N/A	Passive	Maximum of 10/20/30/40 charges; Lose 1/3 charges on death
Solstice	Luminescence	Self	15/30/45/60	8 seconds	Buff
Solstice	Solar Slash	Self	40/60/80/100	N/A	On-Hit	Primary target only; Applies every 3 (2) attacks; Damage increased by 120% on non-hero units
Solstice	Crescent Strike	Self	60/90/120/150	N/A	On-Hit	Applies every 3 (2) attacks
Orb of Zamos	Passive	Self & Ally Hero	5	N/A	Buff	Applies while synchronized to ally hero
Shadowblade	Feint's Siphon	Self	Varies	5 seconds	Buff	Steals 10/20/30/40% of target's total Damage
Stealth Hunter	On the Hunt	Self	50	1 Attack or 15 seconds (Stealth)	On-Hit
The Gladiator	Flagellation	Self	15/30/45/60	N/A	On-Hit	Applies when off cooldown; Denying allies does not put ability on cooldown
Tremble	Impalers	Passive	10 per charge	2.5 seconds	On-Hit	Applies a debuff that grants bonus Attack Damage against unit; Max 1/2/3/4 charges
War Beast	Battle Cry	Ally Heroes (Global)	15/20/25/30	20 seconds	Buff
War Beast	Battle Cry	Ally Non-Hero Units (Global)	6/8/10/12	20 seconds	Buff
Whispering Helm	Activation	Ally Unit	Varies	Permanent	Buff	Grants Damage equal to 25% of owner's Damage

Base Damage increasers

Hero/Item	Source	Target	+ Base Damage	Duration	Type	Notes
Abyssal Skull	Aura	Ally Units/Heroes	15%	N/A	Aura
Andromeda	Dimensional Link	Self	10/15/20/25	N/A	Passive
Behemoth	Enrage	Self	100/175/255/325%	1 Attack or 14 seconds	Buff
Blood Hunter	Blood Sense	Self	10/20/30/40%	N/A	On-Hit	Applies against heroes at 35% Health or less
Gunblade	Lethal Range	Passive	30/45/60/75%	N/A	On-Hit	Applies when attacking a unit within 200 units; Bonus damage is halved against Creeps
Gunblade	Lethal Range	Passive	Up to 20/30/40/50%	N/A	On-Hit	Applies when attacking a hero at >200 units; Grants 20/30/40/50% Base Damage at 200 Range, tapering to 0 over 600 Range (increases to 700 with Wingbow)
Hammerstorm	Brute Strength	Self	50/100/150%	30 seconds	Buff
Moon Queen	Lunar Glow	Ally Ranged Units/Heroes (Aura)	5/10/15/20% or 15/20/25/30%	N/A	Aura	Base Damage bonus increases during night time
Pebbles	Enlarge	Passive	40/80/120	N/A	Passive	Bonus Base Damage is affected by Base Damage modifiers
Plated Greaves	Activation	Ally Non-Hero Units	20%	60 seconds	Buff	Bonuses are doubled for the first 10 seconds
Prisoner 945	One Man Riot	Passive	15/20/25/30% + 15% per charge	N/A	Passive	Gains one charge per visible enemy hero within 700 radius
The Dark Lady	Dark Blades	Self	35/50/65/80%	3/4/5/6 seconds	Buff
Transmutanstein	Transmutanstein W	Other Boss	66%	5 seconds (Channeling)	Buff
War Beast	Primal Rage	Owned Units (Aura)	10/15/20/25%	N/A	Aura
Wolf Commander	Damage Aura	Ally Units (Aura)	30%	N/A	Aura

Damage reducers

Damage

Unit/Item	Source	Target	- Damage	Duration	Type	Notes
Corrupted Disciple	Corrupted Conduit	Enemy Hero	1.3/2.6/3.9/5.2 per charge	N/A	Debuff	Max 65/130/195/260; Adds one charge per 0.2 seconds while linked; lingers for 13 seconds
Gauntlet	Enfeeble	On Attack	Varies	4 seconds	Debuff	Reduces 1% of target's total Damage per charge at application; Charges are individually timed; Reduces Damage in increments of 3
Kane	Steel Resolve	Enemy Unit	20% per charge	4 seconds	On-Hit	Applies only against Kane; Max 1/2/3/4 charges
Legionnaire	Terrifying Charge	Enemy Units	50%	4/5/6/7 seconds	Debuff
Master of Arms	Cheetah	Self	20%	N/A	On-Hit	Only applies when attacking enemy heroes
Shadowblade	Feint's Siphon	Enemy Unit	10/20/30/40%	5 seconds	Debuff
Swiftblade	Blade Frenzy	Self	50/40/30/20%	5 seconds	Buff	Disables Way of the Sword

Abilities that scale with Attack Damage

These abilities deal damage based on the user's total Damage or Base Damage.

Abilities with the "Attack" Damage Type have the same properties as an autoattack, which means it matches the hero's current Damage Type and applies Attack Modifiers.

Hero	Source	Scales with	Damage dealt	Damage Type	Notes
Apex	Decimate	Total Damage	50/100/150/200%	Physical
Artillery	LRM	Total Damage	(10/15/20/25 + 15%) * [1 + (0.01 * (x-1))] per hit	Physical	Deals 1% additional damage per rocket fired while channeling; AoE damage tapers over 200 radius from hit unit
Calamity	Funeral Pyre	Total Damage	100%	Attack
Qi	Enlightenment	Total Damage	60%	Superior Magic	Scales off of opponent's attack damages
Deadwood	Oakbolt	Total Damage	100%	Physical
Draconis	Fiery Barrage	Total Damage	4/8/12/16 + 30% per 4 seconds	Physical	Deals 0.5/0.8/1.1/1.4x damage vs. heroes; damage increases by 100% per additional charges vs. non-hero units (Max 8 charges)
Drunken Master	Lunge	Total Damage	20/40/60/80 + 50% per hit	Attack	Hits twice
Emerald Warden	Silencing Shot	Total Damage	60 + 100/110/120/130%	Magic
Flux	Magnetic Surge	Total Damage	100% + 30/60/90/120% Strength	Attack
Grinex	Illusory Assault	Total Damage	100%	Physical	First illusion attack only
Jeraziah	Righteous Strike	Total Damage	50/80/110/140%	True
Klanx	A.T.K. Drones	Base Damage	20%	Magic	Applies to 3rd Minion
Legionnaire	Terrifying Charge	Base Damage	150/200/250/300%	Physical
Maliken	Life Essence	Total Damage	5%	N/A	Heals 10/20/30/40 + % of Attack Damage on attack
Monkey King	Illusive Dash	Total Damage	15/20/25/30 + 100%	Physical
Night Hound	Pounce	Total Damage	30/60/90/120 + 100%	Attack
Nitro	Ballistic	Total Damage	100% or 10/20/30/40/50%	Attack/Physical	Only applies attack modifiers on first hit; consecutive hits deal reduced damage in Physical Damage
Nitro	HEAT Round	Total Damage	80/160/240 + 20/40/60%	Physical
Nomad	Mirage Strike	Base Damage	60/80/100/120 + 100%	Attack
Nomad	True Strike	Base Damage	80/120/160/200 + 100%	Attack
Pandamonium	Flurry	Both	Attack Damage + 15/25/35/45% Base Damage per hit	Physical
Pandamonium	Face Smash	Both	Attack Damage + 30/75/120% Base Damage per hit	Attack	Hits up to 5 times
Sapphire	Unstable Shard	Total Damage	80/100/120/140%	Magic	Applies for up to 10 attacks used on the Shard; half damage vs. non-hero units
Swiftblade	Counter Attack	Total Damage	100%	Physical	10/15/20/25% chance to activate when damaged by an enemy hero
The Dark Lady	Charging Strikes	Total Damage	100%	Attack	Consecutive attacks deal 15% less damage than the previous
Tundra	Cold Shoulder	Total Damage	100%	Attack